The battle was fought on May 12-13, 1865, at Palmito Ranch, which is near the city of Brownsville. This was more than a month after Confederate General Robert E. Lee's surrender at Appomattox, which is pretty wild when you think about it. The battle was a small one, but it's still a significant part of American history.
The battle was between Confederate and Union forces, with the Confederates ultimately emerging victorious. However, the victory was short-lived, as the Confederate commander soon learned of the surrender at Appomattox and surrendered his own forces. It's a pretty fascinating story, and one that not many people know about.